President Barack Obama waves from the top of the steps of Air Force One at Andrews Air Force Base in Md., Tuesday, Jan. 29, 2013. Obama is traveling to Las Vegas to deliver a speech on

 

              President Barack Obama waves from the top of the steps of Air Force One at Andrews Air Force Base in Md., Tuesday, Jan. 29, 2013. Obama is traveling to Las Vegas to deliver a speech on
President Barack Obama waves from the top of the steps of Air Force One at Andrews Air Force Base in Md., Tuesday, Jan. 29, 2013. Obama is traveling to Las Vegas to deliver a speech on immigration. (AP Photo/Susan Walsh)